Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d6618395441c59…

MALICIOUS

PDF

57.1 KB Created: 2020-08-30 05:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa4de3ea158dcb6b705cee5603c45b06 SHA-1: 295711623c125168a83bf50c5990d69bd0714876 SHA-256: 44d6618395441c59302a283b54fb669a37d3097a12d780abbfffe6674498eeda
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which likely leads to further malicious content or exploits. The presence of numerous other PDF links, while some are benign, suggests a link farm or SEO poisoning tactic to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=heather+graham+gi%25E1%25BA%25A3+wiki
    • https://cdn.shopify.com/s/files/1/0452/4769/2957/files/21842756290.pdf
    • https://cdn.shopify.com/s/files/1/0435/1256/1819/files/what_is_pm_app_backup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/32603494139.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/instrumentation_control_data_acquisition_and_processing_with_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/daphne_and_velma_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/mukelitofoxosaxonameroluv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/jebefiwafuxadulamebuxazer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/94760592726.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/88553710685.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/conjuntivite_bacteriana_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/nakabiwuzosixuniwiju.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/37611102571.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0938/files/66136603148.pdf
    • https://cdn.shopify.com/s/files/1/0461/8980/5731/files/zebatokuna.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/99778765033.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009fb2.bin
ec8c1bdbadd2b8ab0500f9f8d3375af4048c9c7ac7d8a250de8d5471d4607ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB2 5272 bytes
font_01_sfnt_off0000b0ff.bin
94a259490e57f664b27c018c3ade0644bc140b1ca1719ce6f54e9b6ae7ee176c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FF 10772 bytes

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